<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
    <script type="text/javascript">
/*
    let show = function()
    {
      alert('a');
    };
*/
    let show = ()=>
    {
      alert('a');
    };
    show();
    </script>
  </head>
  <body>

  </body>
</html>
